MonoOne
Independent software · macOS

Small software.Private by default.

We build tools that keep your data on your device and leave you with files you own.
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What we believe

Four rules every MonoOne product follows. No exceptions, no fine print.
Local-first
Your data stays on your device. Everything core works offline and without an account.
Files you own
Plain Markdown on disk. No proprietary formats, no lock-in, no export ritual.
Private by default
Cloud features are opt-in and redacted. Sharing is end-to-end encrypted.
Made for the Mac
Native, signed and notarized. Apple Silicon and Intel, macOS 13.4 or later.

Projects

One focused product, built carefully. More when it's ready.
Free in early access01

Index One

Secure, 100% local meeting notes for macOS.

IndexOne records your calls, transcribes them and writes a structured note you own as plain Markdown, all on your Mac. Recordings, transcripts and notes stay 100% on your device: no account and no cloud processing. Your library sits in an encrypted database, and nothing is sent anywhere unless you explicitly choose to.

Download for Macindex-one.ioStar · 1
  • macOS 13.4+
  • Apple Silicon & Intel
  • No account needed

  • Both sides of the call

    Your mic and the other side, merged into one clear transcript.

  • On-device Whisper

    Transcription runs locally with Metal. No cloud transcription.

  • Notes you own

    Summary, decisions and action items as Markdown in your Obsidian vault.

  • Answers with sources

    Ask mid-call or months later and see which meetings each answer came from.

  • Encrypted and lockable

    One encrypted database on your Mac, plus per-folder Touch ID locks.

  • Your AI, your choice

    On-device model or opt-in cloud. A local MCP server for your own agents.

Found a bug or have an idea?

We build in the open. Issues and discussions live on GitHub.
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